Display apparatus
US8730154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2012 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Nov 8, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device, an electrode configuration and a sequence for activating those electrodes for the purpose of switching device states quickly with minimum flicker during bi-stable image reset. The disclosure addresses the constraints of electrofluidic technology: 1) the polar fluid can be attracted to a position with voltage, but it cannot be repelled, and 2) because the polar fluid translates, changing its area against an electrode and thereby changing the capacitance, the time to discharge the capacitor formed by area contact with a polar fluid is significantly smaller than the time to charge a capacitor, which requires translation of the fluid. Setting the grayscale is based on discharging, not charging, when possible. In addition, the use of pixel-level partial reset states reduces the appearance of flicker further by minimizing the change in pixel state during data write/update.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.